Ramp-Function Generator - Siemens SIMOTICS S-1FL6 Operating Instructions Manual

The following diagram shows how the internal torque limit functions:
Torque limit reached (TLR)
When the generated torque has nearly (internal hysteresis) reached the value of the positive
torque limit or negative torque limit, the signal TLR is output.
7.3.3

Ramp-function generator

The ramp-function generator is used to limit acceleration in the event of abrupt setpoint
changes and thus helps prevent load surges during drive operation.
The ramp-up time p1120 and ramp-down time p1121 can be used to set acceleration and
deceleration ramps separately. This allows a smoothed transition in the event of setpoint
changes.
The maximum speed p1082 is used as the reference value for calculating the ramp-up and
ramp-down times.
You can see the properties of the ramp-function generator from the diagram below:
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E37208830-002
Control functions
7.3 Speed control (S)
157